The World FactbookThe World Factbook provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 266 world entities.

And get this...it's developed by none other than the CIA - the Central Intelligence Agency. Good stuff.

50states.comPretty much everything you would ever want to know about each of the 50 United States. State bird, state nickname, weather, population, highest point, government. You get the idea. It's got everything.